package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class SetmealServiceImp implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;
    // 分页查询
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        List<SetmealVO> list = setmealMapper.pageQuery(setmealPageQueryDTO);
        Page<SetmealVO> page = (Page<SetmealVO>) list;
        return new PageResult(page.getTotal(), page.getResult());
    }
    // 启用停用套餐
    @Override
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if (status == StatusConstant.ENABLE) {
            List<Dish> dishList = dishMapper.getBysetmealId(id);
            if (dishList != null && dishList.size() > 0) {
                for (Dish dish : dishList) {
                    Integer status1 = dish.getStatus();
                    if (status1 == StatusConstant.DISABLE) {
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                }
            }
        }
        setmealMapper.startOrStop(status,id);
    }
    // 根据id查询套餐和菜品
    @Override
    public SetmealVO getByIdWithDishes(Long id) {
        SetmealVO setmealVO = new SetmealVO();
        Setmeal setmeal = setmealMapper.getById(id);
        BeanUtils.copyProperties(setmeal,setmealVO);
        List<SetmealDish> dishes = setmealDishMapper.getBysetmealId(id);
        setmealVO.setSetmealDishes(dishes);
        return setmealVO;
    }
    // 修改套餐
    @Override
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.update(setmeal);
        Long setmealId = setmeal.getId();
        setmealDishMapper.deleteBySetmealId(setmealId);
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> setmealDish.setSetmealId(setmealId));
        setmealDishMapper.insertBatch(setmealDishes);
    }
    // 新增套餐
    @Override
    public void saveWithDishes(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.insert(setmeal);
        Long setmealId = setmeal.getId();
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> setmealDish.setSetmealId(setmealId));
        setmealDishMapper.insertBatch(setmealDishes);
    }
    // 删除套餐
    @Override
    @Transactional
    public void delete(List<Long> ids) {
        //遍历获取状态
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);
            Integer status = setmeal.getStatus();
            if (status == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        // 遍历删除套餐
        for(Long id : ids){
            setmealMapper.deleteById(id);
            setmealDishMapper.deleteById(id);
        }
    }

}
